WO2016143081A1

WO2016143081A1 - Door latch device

Info

Publication number: WO2016143081A1
Application number: PCT/JP2015/057071
Authority: WO
Inventors: ブライアンフェリス; ブライアンケプラー; アーロンマーティン
Original assignee: ジーコムコーポレイション
Priority date: 2015-03-10
Filing date: 2015-03-10
Publication date: 2016-09-15
Also published as: US20190112841A1; MX2017010856A; EP3269908A1; PL3269908T3; EP3269908A4; US10829965B2; CN107250474B; CN107250474A; EP3269908B1

Abstract

Provided is a door latch device wherein child safety lock and double lock mechanisms are simplified, thereby achieving a reduction in size. A child safety lock lever 33 and a double lock lever 28 are supported by a support shaft 32, and the child safety lock lever 33 and the double lock lever 28 are linked by an interlocking means 282b, 337 such that the double lock lever 28 is moved toward the double lock position in association with the child safety lock lever 33 moving from a second position, which is a child safety lock position, to a third position.

Description

Door latch device

The present invention relates to a door latch device including a double lock mechanism that disables an unlocking operation of a lock knob provided on the inside of a vehicle and a child lock mechanism that disables a door opening operation by an inside handle on the inside of the vehicle.

The door latch device has a lock knob for unlocking / unlocking operation provided inside the door of the door, in addition to a normal locking / unlocking mechanism that can be switched to an unlocked state that allows the door to be opened and a locked state that disables the door. Even if a child seated on the rear seat in the vehicle opens the door inside the door, the double lock mechanism that prevents the locking / unlocking mechanism from being illegally switched to the unlocked state when unlocked from the outside, Some include a child lock mechanism that prevents the door from being opened carelessly (see, for example, Patent Document 1).

Japanese Patent No. 4473919

The door latch device described in Patent Document 1 includes an operating member that is driven to rotate from a first position to a third position by a child and double lock motor, one end side of which is connected to the operating member, and the pivot of the operating member. A child lever (child lock lever) that is pivotally supported by a shaft that is spaced apart from each other and that can be switched from a child unlocked state to a child locked state when the actuating member moves from the first position to the second position; When the operating member moves from the second position to the third position, the block portion provided on the arm portion extending from the operating member comes into contact with the blocked portion of the second sub lever (open link), and the second sub lever By constraining to the lock position, a double lock state is established.

In the door latch device described in Patent Document 1, the operation of switching the child lever to the child lock state and the double lock state is performed via an operation member driven by a child and double lock motor, and the operation member Is provided with an arm portion having a large operating region for restraining the second sub-lever to the locked position, so that the child and the double lock mechanism are complicated and the casing in which the child and the double lock mechanism are accommodated is provided. Since a large space for accommodating the operating member having the arm portion must be ensured, there is a problem that the casing and thus the door latch device are enlarged.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a door latch device in which the child and the double lock mechanism are simplified and the size can be reduced.

The above problems are solved by the present invention as follows.
A first invention includes a meshing unit having a meshing mechanism that can be engaged with a striker on a vehicle body side, and an actuator unit that is coupled to the meshing unit and has an operation mechanism for operating the meshing mechanism. The mechanism is an unlocking position based on the operation of an inside lever provided on the inside of the door for release operation based on the opening operation of the inside handle of the inside handle, and a lock provided on the inside of the door for the door, and a lock knob for unlocking operation. And a locking / unlocking lever that can be moved to the locking position, and can be moved to the unlocking position and the locking position in conjunction with the locking / unlocking lever, and when inside the unlocking position, the inside handle and the outside of the door Based on the door opening operation of the outside handle provided in the When the lock mechanism is in the locked position, the open link that disables the engagement between the meshing mechanism and the striker and the release operation of the inside lever are transmitted to the meshing mechanism. It is possible to move to a first position that is a child unlocked state that enables disengagement with the striker, and a second position that is regarded as a child locked state that disables disengagement of the meshing mechanism with the striker as transmission is impossible. A child lock mechanism having a child lever, a double unlock position allowing the open link to move in the lock position direction, and blocking the movement of the open link from the lock position toward the unlock position. A double lock lever movable to a double lock position, and the child lever The double lock lever can be moved to the third position passing through the first position, the second position, and the third position passing through the second position, and the double lock lever can be moved to the double lock. A motor that moves to a position,
The child lever and the double lock lever are supported by a support shaft, and the child lock lever and the double lock lever are moved together with the movement of the child lever to the third position. It is characterized in that it is linked by interlocking means so that it can be moved in the direction of the double lock position.

In a second aspect based on the first aspect, the interlocking means is provided on the child lever side and on the double lock lever side, and the child lever passes through the second position. The drive unit abuts when moving to the third position, and the double lock lever includes a driven unit that is moved to the double lock position by the child lever.

A third invention is characterized in that, in the second invention, the drive unit and the driven unit are provided on the opposing surfaces of the central part supported by the support shaft in the child lever and the double lock lever. It is said.

In a fourth aspect based on the third aspect, two driven parts are provided in the circumferential direction centered on the support shaft, and a gap is formed between the two driven parts. The drive unit is fitted so as to be able to rotate by a predetermined angle about the support shaft, and the child lever moves to the third position through the second position, and the third When the drive unit moves from the position to the first position, the drive unit comes into contact with the driven unit on the rotation direction side, so that the double lock lever moves in the double lock position direction in conjunction with the child lever. And the double unlock position direction.

According to a fifth invention, in any one of the first to fourth inventions, the open link and the double lock lever are arranged so that at least a part of them is opposed to each other, and the open link is opposed to the opposing surface. A block portion is provided on each opposing surface on the double lock lever side, and when the open link is in the lock position and the double lock lever is in the double lock position, the block portion is It is characterized in that the movement of the open link in the unlock position direction is blocked by approaching or abutting the blocked part.

According to the present invention, the child lever is directly driven by the motor so that the child lever can move to the first position, the second position, and the third position passing through the second position, and the child lever moves to the first position. The child lock mechanism can be switched to the child unlocked state by moving the child lock mechanism to the second position, and the child lever and the double lock lever are supported coaxially by the support shaft. In addition, the child lever and the double lock lever are linked with interlocking means so that the double lock lever is moved in the direction of the double lock position in conjunction with the movement of the child lever to the third position. The child and double lock mechanism are simplified and the door latch device can be downsized.

It is the side view which removed the cover and looked at the door latch device concerning the present invention from the car inside. Similarly, it is the perspective view which looked at the door latch apparatus which removed the casing from the diagonally forward side of the vehicle outer side. Similarly, it is a rear view of a door latch device. It is a disassembled perspective view of a child lock mechanism and a double lock lever. It is a perspective view for demonstrating the linkage relation of a child lever and a double lock lever. It is the side view which looked at linkage relation with a double lock lever when a child lever exists in the 1st position from the vehicle inside. Similarly, it is the side view which looked at the linkage relation with the double lock lever when a child lever moved to the 2nd position from the vehicle inside. Similarly, it is the side view which looked at linkage relation with the double lock lever when a child lever moved to the 3rd position from the car inside. It is a perspective view for demonstrating the linkage relation of an open link and a double lock lever. It is the side view of the principal part which looked at the door latch device in case a child lock mechanism is in a child unlocking state from the vehicle inside. It is the side view of the principal part which looked at the door latch apparatus when a child lock mechanism was made into the child lock state from the vehicle inside. It is the side view of the principal part which looked at the door latch device when a double lock lever was made into a double lock state from the car inside. It is the side view of the principal part which looked at the door latch device when a double lock lever was made into a double lock state from the vehicle outside. It is the side view seen from the vehicle inside about the modification of the interlocking means of a child lever and a double lock lever.

Hereinafter, one embodiment of a door latch device of the present invention is described based on a drawing.
As shown in FIGS. 1 to 3, a door latch device 1 is provided in a rear end portion of a rear door (hereinafter abbreviated as a door) of a vehicle (not shown), and a meshing unit 2 for holding the door in a closed position; An actuator unit 3 that is integrally coupled to the meshing unit 2 and that can operate a meshing mechanism (to be described later) of the meshing unit 2 is provided. In order to clarify the internal structure of the actuator unit 3, a cover 4 that covers the vehicle inner side surface of the actuator unit 3 is shown in FIG. 1, and a vehicle outer side surface of the actuator unit 3 and the meshing unit 2 in FIG. 2. The casing 5 that covers the front surface of each is omitted.

As shown in FIG. 3, the meshing unit 2 has a box-like body 6 made of synthetic resin with an open rear surface, fixed to the rear surface of the body 6, and a door 6 together with the body 6 by a plurality of bolts (not shown). A metal cover plate 7 fixed to the inner surface of the rear end portion of the inner panel, and supported by a latch shaft 8 in the front-rear direction and housed in an internal space between the body 6 and the cover plate 7, A latch 9 having an engaging groove 9a with which S can be engaged, and also supported by a ratchet shaft 10 in the front-rear direction, accommodated in an internal space between the body 6 and the cover plate 7, and engaged with the latch 9. Accordingly, the ratchet 11 that prevents the latch 9 from rotating in the opening direction (the direction in which the engagement with the striker S is released) is fixed to the ratchet shaft 10 on the front side of the body 6. Open lever 12 (see FIGS. 1 and 2) to the body to rotate and a. The latch 9 and the ratchet 11 correspond to the meshing mechanism of the present invention.

The actuator unit 3 is accommodated in the above-described synthetic resin casing 5 fixed to the body 6 of the meshing unit 2 and the front upper portion of the casing 5 with the rotating shaft inclined obliquely forward and downward. The locking / unlocking motor 13 that rotates forward and backward based on the operation of (Omitted), the worm 14 fixed to the rotating shaft that faces downward of the locking / unlocking motor 13, and the shaft 15 that meshes with the worm 14 and that faces inward and outward of the vehicle. Is pivotally supported by the worm wheel 16 pivotally supported by the casing 5 and the shaft 17 facing the interior and exterior directions of the casing 5, and can be pivoted to an unlocked position that allows the door to be opened and a locked position that is disabled. The locking / unlocking lever 18 is pivotally supported by a shaft 19 that is provided on the upper portion of the cover 4 and faces the outside of the vehicle. A knob lever 21 connected to a hook knob (not shown) by an operation force transmission member D1 such as a Bowden cable, and a lower portion connected to a pin 20 provided at the upper end portion of the locking / unlocking lever 18 and facing inward of the vehicle. An open link 22 that can be rotated to the unlock position and the lock position in conjunction with the lock lever 18, and a shaft 23 that has a lower end facing the inside / outside direction provided in the casing 5 at an upper portion close to a child lever 33 described later. An inside lever 24 that is pivotally supported and is connected to an inside handle (not shown) for opening the door provided on the inner side of the door by an operating force transmission member D2 such as a Bowden cable, and the body 6 in the front-rear direction And is connected to an outside handle (not shown) provided outside the door by a rod (not shown). The door unlocking operation using the outside lever 26 and the inside handle can be transmitted to the open link 22 and the ratchet 11 of the meshing unit 2 via the inside lever 24. A child lock mechanism 27 that can be switched, a double unlock position that is linked to the open link 22 and the child lock mechanism 27 and allows the open link 22 to move in the lock direction, and the unlock of the open link 22 in the lock position. It has a double lock lever 28 that can be moved to a double lock position that makes it impossible to move in the lock position direction, and a switch plate 29 that has a female connector 291 to which an external energization connector (not shown) is connected. .
The locking / unlocking motor 13, worm wheel 16, locking / unlocking lever 18, knob lever 21, open link 22, inside lever 24, child lock mechanism 27, double lock lever 28, and a child / double lock motor 35 described later This corresponds to the operation mechanism according to the present invention.

The worm wheel 16 rotates forward and backward from the neutral position against the biasing force of the spring 30 based on the forward and reverse rotation of the locking / unlocking motor 13, and when the rotation of the locking / unlocking motor 13 stops, It automatically returns from the position rotated by the force to the neutral position.

The locking / unlocking lever 18 has a tooth portion 181 that meshes with a tooth portion 161 provided at the center of the worm wheel 16, and the worm wheel 16 rotates forward and backward based on the rotation of the locking / unlocking motor 13. The locking / unlocking lever 18 is rotated to an unlock position that allows the door to be opened by the outside handle and the inside handle, and a locked position that prevents the door from being opened.

The knob lever 21 can be rotated between an unlock position and a lock position based on an unlock operation and a lock operation of the lock knob. When the lock knob is locked, the knob lever 21 is predetermined in the counterclockwise direction from the unlock position shown in FIG. It rotates at an angle and moves to the lock position (see FIG. 12). At this time, the locking / unlocking lever 18 connected to the knob lever 21 and the open link 22 connected to the locking / unlocking lever 18 are set to the unlocked position where the door can be opened by the outside handle and the inside handle. It is rotated to the locked position (see FIGS. 10 and 12).

The inside lever 24 is disposed between the open link 22 and a child / double-lock motor 35 described later, and rotates counterclockwise in FIG. 1 against the urging force of the spring 42 by opening the inside handle. When the locking / unlocking lever 18 is in the unlocked position and the child lock mechanism 27 is in the child unlocked state, via a release lever 31 and an open link 22 described later linked to the inside lever 24, The door can be opened by rotating the open lever 12 in the release direction and releasing the engagement between the ratchet 11 and the latch 9.

A substantially L-shaped fitting hole 241 into which an upper connecting protrusion 341b provided on the connecting lever 34 described later can be fitted is formed in the lower portion of the inside lever 24 near the shaft 23 (see FIG. 4). . When the child lock mechanism 27 is in the child unlocked state, the upper connecting protrusion 341b is fitted in the vertically long hole 241a facing the up and down direction of the upper part of the fitting hole 241 so as to be movable in the up and down direction. When the door is opened, the driving force in the release direction of the inside lever 24 can be transmitted to the later-described release lever 31 via the upper connecting protrusion 341b. Further, when the child lock mechanism 27 is in the child lock state, the upper connecting protrusion 341b has a wide rearward hole that faces the lower rear (the direction opposite to the release operation direction of the inside lever) continuous with the vertically long hole 241a. It moves downward to the part 241b. As a result, when the door is opened by the inside handle, the release operation of the inside lever 24 is not transmitted to the release lever 31 via the upper connecting projection 341b by swinging the inside lever 24 (detailed description). Will be described later).

The open link 22 has a lower portion connected to a connecting end portion 261 on the inner side of the outside lever 26 so as to be rotatable by a predetermined angle in the front-rear direction, and an upper portion connected to the locking / unlocking lever 18 so as to be movable in the vertical direction. In conjunction with the pivoting operation of the locking / unlocking lever 18, a predetermined counterclockwise direction from the unlocked position shown in FIG. 1 against the urging force of the spring 43 around the connecting end 261 of the outside lever 26. Move to the lock position that rotates at an angle. When the open link 22 is in the unlocked position, the upper surface of the release releasing portion 221 provided at the middle portion of the open link 22 in the vertical direction can come into contact with the lower surface of the release releasing portion 121 of the open lever 12. .

When the door is in the fully closed state and the locking / unlocking lever 18 and the open link 22 are in the unlocked position, when the outside lever 26 is released based on the opening operation of the outside handle, the open link 22 moves upward. By moving and rotating the open lever 12 in the release direction, the latched state of the ratchet 11 that rotates integrally with the open lever 12 and the latch 9 is released, and the door can be opened (see FIG. 10). ).

When the door is locked in the fully closed state, the locking / unlocking motor 13 is operated in the locking direction by a portable remote control switch or the like, and the locking / unlocking lever 18 and the open link 22 are moved to the locked position. Even if the open link 22 moves upward due to the release operation of the outside lever 26, the release release portion 221 is swung relative to the release release portion 121 of the open lever 12, so that the door cannot be opened. (See FIG. 12).

As shown in FIGS. 4 and 9, the child lock mechanism 27 is pivotally supported by the shaft 23 of the inside lever 24 so that it overlaps with the outer surface of the inside lever 24. A release lever 31 in which a long hole 311 in the vertical direction is formed in the upper part, and a support shaft 32 in the vehicle interior / exterior direction in which a middle portion in the front / rear direction is provided in the casing 5 in a lower end portion slightly rearward of the casing 5. A synthetic resin child lever 33 that pivots on the front and rear and a release lever 31 that overlaps with the outer surface of the vehicle and that is movable in the vertical direction. While having the lower connection protrusion 341a and the upper connection protrusion 341b which face, the up-down direction through-hole 342 which the axis | shaft 23 penetrates between both

connection protrusions

341a and 341b And a vertical direction of the connect lever 34 having. The end of the support shaft 32 on the inner side of the vehicle is supported on the inner surface of the cover 4, and the end of the outer side of the vehicle is similarly supported on the inner surface of the casing 5.

At the rear end of the release lever 31, a release portion 312 is formed integrally with the lower end of the open link 22 so that the open link 22 can be moved upward (release direction) and facing the vehicle outward direction. .

The upper connecting protrusion 341b of the connect lever 34 slidably passes through the long hole 311 of the release lever 31 and is fitted in the fitting hole 241 of the inside lever 24. Further, the lower connecting projection 341a of the connect lever 34 is slidably fitted in an arc-shaped connecting hole 331 that is formed in the front and rear direction of the child lever 33 below the shaft 23 and is long in the front-rear direction.

A child / double-lock motor 35 capable of rotating in the forward and reverse directions is housed in the front lower portion of the casing 5 with the rotation axis inclined forward, and the helical gear 36 fixed to the rotation shaft has a forward / reverse rotation. A cylindrical moving member 37 that moves in the axial direction by rotation is screwed together. The moving member 37 is provided with a pair of drive pins 371 projecting inward and outward of the vehicle.

At the front end portion of the child lever 33, a bifurcated connecting portion 332 that can sandwich the moving member 37 from the rear is formed, and the U-shaped notch groove 333 formed in the connecting portion 332 is connected to one of the moving members 37. The front end of the child lever 33 is connected to the moving member 37 by fitting the pair of drive pins 371 from the rear. A detection lever portion 334 extending rearward and upward is integrally formed at the front end portion of the child lever 33 so as to be continuous with the connecting portion 332.

When the child lever 33 is in the child unlock position shown in FIG. 1, the front surface of the upper end portion of the detection lever portion 334 contacts the switch pin 381 of the child lock detection switch 38 provided at the lower end portion of the switch plate 29. Then, by pushing this, the child unlocked state is detected. When the child lever 33 is rotated counterclockwise from the child unlock position shown in FIG. 1 to the child lock position by the operation of the child / double lock motor 35, the upper end of the detection lever portion 334 is detected. Is moved away from the switch pin 381 to detect a child lock state (details will be described later).

The switch plate 29 includes a first switch plate 292 for energizing the locking / unlocking motor 13, the door opening / closing detection switch 39 and the locking / unlocking detection switch 40, a child / double lock motor 35, a child lock detection switch 38, and a double lock detection. The switch 41 includes a second switch plate 293 that energizes the switch 41, and the first switch plate 292 is connected to the second switch plate 293. The door opening / closing detection switch 39 and the locking / unlocking detection switch 40 are attached to the first switch plate 292, and the child lock detection switch 38 and the double lock detection switch 41 are attached to the second switch plate 293, respectively (see FIG. 1). ).

As shown in detail in FIG. 9 and FIG. 13, in the lower half of the side surface on the vehicle outer side of the open link 22, a concave portion 222 is formed in the up-down direction that is released outward and downward in the vehicle. Further, the side of the double lock lever 28 that is partially opposed to the open link 22 in the up-down direction has a play so that the upper half can move relative to the open link 22 in the recess 222 of the open link 22 in the front-rear direction. The rib-shaped block part 285 which protrudes in the up-down direction with which it fits is protruded.

When the open link 22 and the double lock lever 28 are in the unlock position shown in FIGS. 1 and 10, the block portion 285 of the double lock lever 28 is located in the concave portion 222 of the open link 22 on the front side which is the blocked portion. The block wall 223a is close to or in contact with the blocked wall 223a and is opposed to the rear wall 223b in the recess 222. Therefore, when the double lock lever 28 is in the double unlock position, the open link 22 moves from the unlock position shown in FIGS. 1 and 10 to the lock position direction (counterclockwise) based on the locking operation of the knob lever 21. Is allowed to do. Further, although detailed description will be given later, the block portion 285 of the double lock lever 28 also has the open link 22 when the open link 22 is in the locked position and the double lock lever 28 is moved to the double lock position. The open link 22 is blocked from moving toward the unlocked position in proximity to or in contact with the front blocked wall portion 223a.

As shown in FIGS. 4 to 8, a shaft hole 281 in the front-rear direction is formed at the lower end portion of the double lock lever 28, and this shaft hole 281 can be rotated by the support shaft 32 that supports the child lever 33. By fitting, the double lock lever 28 is supported by the support shaft 32 together with the child lever 33 so that a part of the portion facing the vertical direction overlaps a part of the side surface of the open link 22 on the vehicle outer side. Yes. Two front and rear driven

protrusions

282a and 282b that are separated from each other in the circumferential direction about the shaft hole 281 are provided on the side surface on the vehicle interior side of the center portion supported by the support shaft 32 that is the lower end portion of the double lock lever 28. A gap 283 having a required width that is released in both the in-vehicle direction and the up-and-down direction is formed between the opposed surfaces of the driven

protrusions

282a and 282b.

On the other hand, the portion of the child lever 33 that faces the lower end of the double lock lever 28, that is, the outer side surface of the center portion of the child lever 33 that is supported by the support shaft 32, has a vehicle outer direction in which a shaft hole 335 is formed. A facing protrusion 336 is formed. When the shaft hole 281 of the double lock lever 28 and the shaft hole 335 of the child lever 33 are fitted to the support shaft 32 on the lower surface of the protrusion 336, the front end portion of the vehicle outside is the driven protrusion of the double lock lever 28. A plate-like drive protrusion 337 having a thickness that fits in the gap 283 between the

portions

282a and 282b with a margin is integrally provided downward. The driving protrusion 337 and the driven

protrusions

282a and 282b correspond to interlocking means according to the present invention.

Although a detailed description will be given later, the linkage relationship between the drive projection 337 and the driven

projections

282a and 282b and the linkage relationship between the child lever 33 and the double lock lever 28 are as follows.
When the child lever 33 is in the first position (child unlock position) shown in FIGS. 1 and 10, the drive fitted in the gap 283 of the double lock lever 28 as shown in an enlarged view in FIG. The protrusion 337 approaches or contacts the front driven protrusion 282a and is separated from the rear driven protrusion 282b.

As shown in FIG. 11, when the child lever 33 is rotated counterclockwise from the first position to the second position (child lock position) by the child and double lock motor 35, it is shown in FIG. As described above, the driving projection 337 simply rotates in the gap 283 to a position close to or in contact with the rear driven projection 282b, and the rotational force of the child lever 33 is not transmitted to the double lock lever 28. .

As shown in FIG. 11, when the child lever 33 is further rotated counterclockwise from the second position to the third position (double lock position) by the child / double-lock motor 35, as shown in FIG. As described above, when the rotational driving force of the driving protrusion 337 is transmitted to the rear driven protrusion 282b, the double lock lever 28 is interlocked with the child lever 33 and counterclockwise about the support shaft 32. To be double-locked.

Next, the operation of the child lock mechanism 27 and the double lock lever 28 will be described in detail.
When the child lock mechanism 27 is in the child unlock state, the child lever 33 is stopped at the first position (child unlock position) shown in FIGS. 1 and 9. In this case, as described above, the upper coupling protrusion 341 b of the connect lever 34 passes through the long hole 311 of the release lever 31 and is fitted into the vertical long hole 241 a of the inside lever 24. Accordingly, when the locking / unlocking lever 18 and the open link 22 are in the unlocked position, the inside lever 24 is released in the door opening direction (counterclockwise in FIGS. 1 and 9) based on a door opening operation by an inside handle (not shown). When actuated, the driving force is transmitted to the release lever 31 via the upper connecting projection 341b, and the release lever 31 rotates counterclockwise in conjunction with the inside lever 24. Thereby, the release portion 312 of the release lever 31 abuts against the lower end of the open link 22 to push up the open link 22 and rotate the open lever 12 in the release direction, whereby the latch 9 and the ratchet 11 are engaged. It is unlocked and the door can be opened.

On the other hand, as shown in FIG. 10, when the child lock mechanism 27 is in the child lock state, that is, for example, a child control operation such as a remote control switch provided on the driver's seat side is performed, or the vehicle speed, parking range, foot brake, etc. As a condition, when the child / double-lock motor 35 is operated in the locking direction and the child lever 33 is moved counterclockwise to the second position (child lock position) by the rotation of the helical gear 36, the child lever 33 The connect lever 34 is moved downward through the lower connection protrusion 341a fitted in the connection hole 331. Then, the upper connection protrusion 341b descends to the upper part of the rearward hole 241b of the fitting hole 241 of the inside lever 24. When the child lever 33 moves to the child lock position, which is the second position, the detection lever portion 334 moves away from the switch pin 381 of the child lock detection switch 38 and transmits a child lock signal to the control circuit device or the like. The child / double-lock motor 35 stops.

When the child lever 33 is moved to the second position, the door latch device 1 is in the child lock state, the lock knob (not shown) in the door is unlocked, the unlocking lever 18 is unlocked, and the inside lever 24 is moved in the release direction. Even if the operation is performed, the inside lever 24 is simply swung, so that the driving force of the inside lever 24 is not transmitted to the release lever 31 via the upper connecting protrusion 341b. Accordingly, in the child lock state, the open lever 12 cannot be moved in the release direction via the release lever 31 and the open link 22, so that a child or the like releases the inside lever 24 from the inside of the vehicle to open the door. It cannot be opened. Even in the child lock state, if the locking / unlocking lever 18 is in the unlocked position, the open link 22 can be opened by operating the door outside handle to release the outside lever 26 in the door opening direction. Since the open lever 12 can be moved in the release direction, the door can be opened from the outside of the vehicle. Further, as described above, when the child lever 33 moves to the child lock position which is the second position and stops, as shown in FIG. 7, the drive protrusion 337 provided on the child lever 33 is provided with the double lock lever 28. The driving force of the child lever 33 by the child / double-lock motor 35 is transmitted to the double lock lever 28 because it only moves toward the rear driven projection 282b in the gap 283 provided in There is nothing. When the child lock state is to be released, the child / double lock motor 35 is operated on the condition that the vehicle control, the parking range, the foot brake, etc. are operated, or the remote control switch provided on the driver's seat side or the like is operated. Can be switched to the child unlocked state by moving the child lever 33 to the first position.

When the door is in the fully closed state and the locking / unlocking lever 18 and the open link 22 are in the locked position, the portable remote control switch and the like are double-locked to operate the child / double-lock motor 35 in the locking direction. Then, as shown in FIG. 11, the child lever 33 is moved in the counterclockwise direction from the first position to the third position (double lock position) through the second position. Then, as described above, the drive protrusion 337 of the child lever 33 fitted in the gap 283 of the double lock lever 28 is rotated in the direction of rotation of the drive protrusion 337 as shown in FIGS. By abutting against the rear driven projection 282b, the double lock lever 28 is interlocked with the child lever 33 and a predetermined angle in the double lock direction (counterclockwise in FIG. 11) about the support shaft 32. It can be rotated.

When the double lock lever 28 is rotated to the double lock position, the front end portion of the detection lever portion 284 formed at the upper end of the double lock lever 28 is attached to the second switch plate 293. When the switch pin 411 of the switch 41 is touched and pushed, a double lock signal is transmitted to the control circuit device or the like, and the child and double lock motor 35 stops.

When the double lock lever 28 moves to the double lock position, the upper end portion of the block portion 285 provided on the double lock lever 28 is locked together with the locking / unlocking lever 18 as shown in FIG. In the recessed portion 222 of the open link 22 that has moved to the position, the door latch device 1 is in a double-locked state in proximity to or in contact with the blocked wall portion 223a on the front side (right side in FIG. 13).

In the double lock state, even when the lock knob in the vehicle is unlocked, the locking / unlocking lever 18 and the open link 22 linked to the locking / unlocking lever 18 are prevented from moving from the locked position toward the unlocked position. The That is, when the lock knob is unlocked in the double-locked state and the locking / unlocking lever 18 and the open link 22 try to move in the unlock position direction (the positions in FIGS. 1 and 10), as shown in FIG. Movement of the open link 22 and the locking / unlocking lever 18 in the unlock position direction is caused by the block wall 223a on the front side of the open link 22 coming into contact with the block portion 285 of the double lock lever 28 stopped at the lock position. Is blocked.

As a result, when the door latch device 1 is in the double-locked state, the door can be opened even if the lock knob in the vehicle is illegally operated from the outside in the unlock position direction as well as the door opening operation by the door outside handle. There is no risk of opening. When the double lock lever 28 is moved in the direction of the double unlock position to release the double lock state, the portable remote control switch or the like is unlocked, and the child / double lock motor 35 is Is operated in the unlocking direction to move the child lever 33 from the third position to the first position. At this time, the drive of the double lock lever 28 in the direction of the double unlock position is such that the drive protrusion 337 of the child lever 33 contacts the driven protrusion 282a on the front side of the double lock lever 28, which is the rotation direction side. Is done.

As described above, in the door latch device according to the above-described embodiment, the child lever 33 and the double lock lever 28 of the child lock mechanism 27 are coaxially supported by the support shaft 32 in the vehicle interior / exterior direction and rotated. The double lock lever 28 is driven directly in the double lock position direction and double unlock position direction by interlocking with the child lever 33 by the interlocking means provided on the opposing surface of the center portion. The child lock mechanism 27 and the double lock lever 28 can be brought close to each other and accommodated compactly, and the casing 5 and the door latch device can be downsized.

Further, the child lever 33 of the child lock mechanism 27 is directly driven by the child / double lock motor 35, and the child lever 33 is moved to the third position passing through the first position, the second position, and the second position, and vice versa. The child lock mechanism 27 can be brought into the child lock and child unlock state and the double lock lever 28 can be moved to the double lock position and the double unlock position simply by moving to the position, thereby simplifying the child and double lock mechanism. The

Further, the release lever 31 and the connect lever 34 constituting the child lock mechanism 27 are arranged between the open link 22 and the child / double-lock motor 35 so as to overlap with the inside lever 24, and the child lever 33 The upper part of the child lock mechanism 27 is assembled and supported between the open link 22 and the child double lock motor 35 by the shaft 23 that supports the inside lever 24. Can be further reduced in size.

As the interlocking means of the child lever 33 and the double lock lever 28, a driving protrusion 337 provided on the child lever 33 side and a gap 283 provided on the double lock lever 28 side and fitted with the driving protrusion 337 are formed. When the child lever 33 passes the second position and moves to the third position, the driving protrusion 337 becomes the driven protrusion 282b. Similarly, when moving from the third position to the first position, the double lock lever 28 moves in the double lock position direction and double unlock position by interlocking with the child lever 33 by contacting the driven protrusion 282a. Since each of them can be moved in each direction, the structure of the interlocking means is simple, and the driving protrusion 337 and the driven protrusion 282 are also provided. , 282b, so integrally provided on the opposing surface of the center portion supported by the support shaft 32 in the child lever 33 and the double lock lever 28, can be accommodated in a compact interlocking means on the support shaft 32 around.

When the open link 22 and the double lock lever 28 are arranged so as to partially face each other, the open link 22 is in the lock position, and the double lock lever is in the double lock position, the facing surface on the double lock lever 28 side The block portion 285 provided on the open link 22 moves in the unlocked position direction by approaching or abutting one block wall portion 223a in the recess 222 provided on the facing surface on the open link 22 side. Is blocked, the structure of the means for bringing the door latch device into a double-locked state is simplified.

Although the embodiment of the present invention has been described above, the following various modifications and changes can be made to the present embodiment without departing from the gist of the present invention.
In the above embodiment, the interlocking means for interlocking the child lever 33 and the double lock lever 28 is provided on the side of the driving protrusion 337 provided on the child lever 33 side and on the double lock lever 28 side. The driving projection 337 is composed of two driven

projections

282a and 282b in which a gap 283 is formed, but interlocking means as shown in FIG. 14 can also be used.

That is, of the two driven

protrusions

282a and 282b provided on the double lock lever 28, the front driven protrusion 282a is omitted and only the rear driven protrusion 282b is provided, and the child lever 33 is When moving to the third position after passing through the two positions, the driving protrusion 337 provided on the side of the child lever 33 abuts on the driven protrusion 282b as in the above embodiment, so that the child lever 33 In conjunction with this, the double lock lever 28 is moved in the double lock position direction. Further, as a means for moving the double lock lever 28 toward the double unlock position, a tension spring 44 or the like whose one end is locked to a stationary member such as the casing 5 (or a torsion spring fitted to the support shaft 32 may be used). At the same time as the child lever 33 moves from the third position to the first position, the double lock lever 28 in the double lock position is moved in the direction of the double unlock position by the urging force of the tension spring 44, so that the casing 5 etc. The stopper 45 provided is used to stop at the double unlock position.

DESCRIPTION OF SYMBOLS 1 Door latch apparatus 2 Engagement unit 3 Actuator unit 4 Cover 5 Casing 6 Body 7 Cover plate 8 Latch shaft 9 Latch 9a Engaging groove 10 Ratchet shaft 11 Ratchet 12 Open lever 13 Locking / unlocking motor 14 Worm 15 Shaft 16 Worm wheel 17 Shaft 18 Locking lever 19 Shaft 20 Pin 21 Knob lever 22 Open link 23 Shaft 24 Inside lever 25 Shaft 26 Outside lever 27 Child lock mechanism 28 Double lock lever 29 Switch plate 30 Spring 31 Release lever 32 Support shaft 33 Child lever 34 Connect lever 35 Child Double-lock motor 36 spiral gear 37 moving member 38 child lock detection switch 39 door opening / closing detection switch 40 locking / unlocking detection switch 1 Double

lock detection switch

42, 43, 44 spring 45 stopper 121 to be released

release portion

161, 181 teeth 221 release release portion 222 recess 223a to be block wall (the block portion)
223b Wall portion 241 Fitting hole 241a Vertically long hole portion 241b Backward-facing hole portion 261 Connection end portion 281

Shaft holes

282a and 282b Driven protrusion (driven portion)
283 Clearance 284 Detection lever part 285 Block part 291 Female connector 292 First switch plate 293 Second switch plate 311 Long hole 312 Release part 331 Connection hole 332 Connection part 333 Notch groove 334 Detection lever part 335 Shaft hole 336 Projection part 337 Drive Projection (drive unit)
341a Lower connecting protrusion (lower connecting portion)
341b Upper connection protrusion (upper connection part)
342 Through-hole 371

Drive pin

381, 411 Switch pin D1, D2 Operating force transmission member S Striker

Claims

A meshing unit having a meshing mechanism that can be engaged with a striker on a vehicle body side, and an actuator unit that is coupled to the meshing unit and has an operation mechanism for operating the meshing mechanism;
The operating mechanism is an inside lever that operates to release based on a door opening operation of an inside handle provided inside the door, and
A lock provided on the inner side of the door, a locking / unlocking lever movable to an unlock position and a lock position based on an operation of a lock knob for unlock operation;
Based on the door opening operation of the outside handle provided on the outside of the inside handle and the door when the unlocked position is movable to the unlocked position and the locked position in conjunction with the locking / unlocking lever. An engagement link between the meshing mechanism and the striker can be released, and when in the locked position, an open link that disables the engagement between the meshing mechanism and the striker;
A first position in which a release operation of the inside lever is transmitted to the meshing mechanism and the engagement mechanism is disengaged from the striker in a child unlocked state; and the striker of the meshing mechanism is not transmitted. A child lock mechanism having a child lever that can be moved to a second position for disabling the engagement of
A double lock movable to a double unlock position that allows movement of the open link in the direction of the lock position and a double lock position that blocks movement of the open link from the lock position to the direction of the unlock position. Lever,
The child lever can be moved to the first position, the second position, and a third position passing through the second position, and the child lever can be moved to the third position, and the double lock A motor for moving the lever to the double lock position,
The child lever and the double lock lever are supported by a support shaft, and the child lock lever and the double lock lever are moved together with the movement of the child lever to the third position. The door latch device is linked with interlocking means so as to be moved in the direction of the double lock position.
The interlocking means is provided on the side of the child lever, and provided on the side of the double lock lever. When the child lever moves through the second position and moves to the third position, the driving unit 2. The door latch device according to claim 1, further comprising: a driven portion configured such that the double lock lever is moved to the double lock position by the child lever.
The door latch device according to claim 2, wherein the driving portion and the driven portion are provided on opposing surfaces of a central portion supported by the support shaft of the child lever and the double lock lever.
Two of the driven parts are provided in the circumferential direction centered on the support shaft, and the drive part is centered on the support shaft in a gap formed between the two driven parts. When the child lever moves to the third position after passing through the second position, and when moving from the third position to the first position, the fitting is performed so as to be able to rotate by a predetermined angle. When the driving part comes into contact with the driven part on the rotation direction side, the double lock lever is moved in the double lock position direction and double unlock position direction in conjunction with the child lever. The door latch device according to claim 3, wherein
The open link and the double lock lever are arranged so that at least a part of them is opposed to each other, and a block portion is provided on the facing surface on the open link side, and a block portion is provided on the facing surface on the double lock lever side. When the open link is in the locked position and the double lock lever is in the double lock position, the unlocking position of the open link is caused by the block portion approaching or contacting the blocked portion. The door latch device according to any one of claims 1 to 5, wherein movement in a direction is blocked.